AI Article Synopsis
- * A study involving 85 healthy 1-month-old infants explored how the season of birth affects sleep architecture through overnight polysomnography, categorizing infants into four groups based on seasonal light.
- * Results indicated that infants born in summer had the highest amounts of stage R sleep but the shortest total sleep time, while those born in winter had more stage T sleep and the lowest amounts of stage R sleep, marking the first study of its kind to link season of birth with infant sleep patterns.
Article Abstract
Individual variation in sleep quality, quantity, and architecture is pronounced in small infants. Reasons for this remain largely unclear, even though environmental and genetic factors have been suggested to play a role. In order to study the effect of birth seasons on infant sleep architecture, 85 healthy 1-month-old infants underwent an overnight polysomnography (PSG). The PSGs were conducted in 2011-2013. The cohort was divided into four subgroups according to the amount of seasonal light at the time of birth, with each group covering a period of approximately three months. The groups were labeled IL (increasing light), L (light), ID (increasing darkness), and D (dark), corresponding to spring, summer, autumn, and winter, respectively. We found the amount of stage R sleep (precursor of REM sleep, formerly active sleep) to be the highest in infants born in summer, whereas infants born in winter presented the smallest amount of stage R sleep. Infants born in summer presented the smallest amount of stage T sleep (transitional sleep), while stage T sleep was most abundant in infants born in winter. In addition, infants born in summer showed the shortest total sleep time (TST) and the smallest number of awakenings during the study night. This was the first PSG study to find out that birth season modifies the sleep architecture of infants.
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| http://dx.doi.org/10.1080/07420528.2019.1629449 | DOI Listing |
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